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Finding the Fourth Proportional to 20,659.80, 31,008.90 and 17,741.40

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Solution

The fourth proportional to 20,659.80, 31,008.90 and 17,741.40 is: 26,628.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659.80 : 31,008.90 = 17,741.40 : x
  2. Step 2: Convert to fraction form
    20,659.80/31,008.90 = 17,741.40/x
  3. Step 3: Cross multiply
    20,659.80x = 31,008.90 × 17,741.40
  4. Step 4: Simplify right side
    20,659.80x = 550,141,298.46
  5. Step 5: Solve for x
    x = 550,141,298.46/20,659.80
  6. Step 6: Final answer
    x = 26,628.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.